What does one do if his or her Sheva Brachos comes out on Seder Night do the Kosos become Sheva Brachos and what are all the other Halachic Implications?
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According to the hagada by the author of K'sav Sofer (which seems to be called Seder Lel Hiskadesh Chag?) the kos shel b'racha of birkas hamazon should be used for sheva b'rachos as well because the birkas hamazon catalyzes the sheva b'rachos anyway and is therefore not serving a double purpose (which could be problematic).
In addition he brings down a hakpada of Rav Ya'akov Emden that the particular cup used for sheva b'rachos should be that of the groom in case each person at the table has his own.